>>95964534
Let me break it down for you
>lvl11 spell storing item
>10 fireballs (20 int)
>wand of fireball minimum 2 charges a day
>maximum 7 charges
>lvl6 charge magic item
>1 charge per spell level
>19 extra charges on the wand
>total: 31 fireballs on a bad day

If no wands of fireball is present well bummer, still 13 fireballs per long rest